CN101742141A - Device and method for receiving and playing digital television signal and television set - Google Patents
Device and method for receiving and playing digital television signal and television set Download PDFInfo
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- CN101742141A CN101742141A CN200810217578A CN200810217578A CN101742141A CN 101742141 A CN101742141 A CN 101742141A CN 200810217578 A CN200810217578 A CN 200810217578A CN 200810217578 A CN200810217578 A CN 200810217578A CN 101742141 A CN101742141 A CN 101742141A
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Abstract
The invention is suitable for the technical field of televisions, which provides a device and a method for receiving and playing a digital television signal and a television set. The device comprises a mainboard of the television set and a USB module, wherein the USB module comprises a digital demodulation chip, a USB controller and a multimedia coding/decoding chip; the digital demodulation chip is used for tuning a digital tuner in the mainboard of the television set to obtain an intermediate-frequency signal for carrying out analog/digital conversion to obtain a digital signal and then carrying out channel demodulation on the digital signal to obtain a TS flow; the USB controller is used for coding the TS flow to generate a USB frame; and the multimedia coding/decoding chip is used for decoding and coding the USB frame to generate a multimedia signal and transmitting the multimedia signal to an image/audio-frequency processor of the mainboard of the television set. Upgrading and converting of an analog television to the digital television can be realized only by replacing the digital tuner and the digital demodulation chip, and has small hardware modification and good extensibility and compatibility.
Description
Technical field
The invention belongs to TV technology, relate in particular to a kind of digital television signal and receive and device, method and the television set play.
Background technology
At present, propelling day by day along with the Digital Television industry, television set receives and playing digital television signal is becoming a kind of trend and trend gradually, television set will receive and play digital TV broadcast signal, common way is: digital tuner receiving digital television broadcast signal, the digital TV broadcast signal that digital demodulator receives digital tuner is demodulated to the transport stream of standard, and (Transport Stream TS) sends special decoding master chip to and decodes and play.Prior art needs different special decoding master chips at the different digital television standard, and when realizing simulated television to the upgrade conversion of Digital Television, hardware is changed big, and extensibility and poor compatibility are unfavorable for the exploitation and the upgrading of new product.
Summary of the invention
The object of the present invention is to provide a kind of digital television signal to receive and device, method and the television set play, be intended to solve prior art when realizing simulated television, the problem of extensibility and poor compatibility to the upgrade conversion of Digital Television.
The present invention is achieved in that a kind of digital television signal receives and the device of playing, and comprises TV SKD and USB module, and described USB module comprises:
The digital demodulation chip is used for the tuning intermediate-freuqncy signal that obtains of the digital tuner of described TV SKD is carried out analog/digital conversion, obtains digital signal, more described digital signal is carried out channel demodulation, obtains TS stream;
The USB controller is used for described TS stream is encoded, and generates the USB frame;
Multi-media codec chip is used for the described USB frame generation multi-media signal of decoding, encode is sent to the image/audio process of described TV SKD.
Described TV SKD comprises:
Image/audio process is used for multi-media signal is decoded and exported;
The numeral tuner is used for receiving digital television signal, and the described digital television signal that receives is carried out tuning, obtains intermediate-freuqncy signal;
Microcontroller is used for control figure tuner receiving digital television signal, and the described digital television signal that receives is carried out tuning, obtains intermediate-freuqncy signal and control chart picture/audio process is decoded to multi-media signal.
Another object of the present invention is to provide a kind of television set that comprises the device that above-mentioned digital television signal receives and plays.
Another object of the present invention is to provide a kind of digital television signal to receive and the method for playing, described method comprises the steps:
The digital tuner receiving digital television signal of TV SKD;
Described digital tuner carries out tuning to the described digital television signal that receives, obtain intermediate-freuqncy signal;
The digital demodulation chip of USB module carries out analog/digital conversion to described intermediate-freuqncy signal, obtains digital signal;
Described digital demodulation chip carries out channel demodulation to described digital signal, obtains TS stream;
The USB controller of USB module is encoded to described TS stream, generates the USB frame;
The multi-media codec chip of USB module is to the described USB frame generation multi-media signal of decoding, encode;
Image/the audio process of TV SKD is decoded to described multi-media signal and is exported.
Compared with prior art, the present invention carries out the tuning intermediate-freuqncy signal that obtains at digital tuner to the digital television signal that receives, by the digital demodulation chip described intermediate-freuqncy signal is carried out analog/digital conversion and channel demodulation, obtain TS stream, utilize the USB controller that TS stream is encoded again, convert the USB frame to, at last by multi-media codec chip to the USB frame decoding, coding generates multi-media signal and plays, realizing the upgrading of simulated television to Digital Television, during conversion, signal to the different digital television standard, only need to change digital tuner and digital demodulation chip, hardware is changed little, extensibility and compatible good more helps the exploitation and the upgrading of new product.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention digital television signal reception that provides and the device of playing;
Fig. 2 is the realization flow figure of the embodiment of the invention digital television signal reception that provides and the method for playing.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In embodiments of the present invention, the numeral tuner carries out the tuning intermediate-freuqncy signal that obtains to the digital television signal that receives, the digital demodulation chip carries out analog/digital conversion and channel demodulation to described intermediate-freuqncy signal, obtain TS stream, the USB controller is encoded to described TS stream, convert the USB frame to, multi-media codec chip is to described USB frame decoding, coding, generate multi-media signal, can realize the reception and the broadcast of digital television signal, realizing the upgrading of simulated television to Digital Television, during conversion, to the signal of different digital television standard, only need to change digital tuner and digital demodulation chip, hardware is changed little, extensibility and compatible good more helps the exploitation and the upgrading of new product.
The digital television signal that Fig. 1 shows the embodiment of the invention to be provided receives the structure with the device of playing, and for convenience of explanation, only shows the relevant part of the embodiment of the invention.It can be to be built in the unit that software unit, hardware cell or software and hardware in the television set combine that this digital television signal receives with the device of playing.This digital television signal receives with the device of playing and comprises: display screen and loudspeaker 11, TV SKD 12, USB module 13.
Wherein TV SKD 12 comprises microcontroller 121, image/audio process 122, digital tuner 123; USB module 13 comprises digital demodulation chip 131, USB controller 132, multi-media codec chip 133.
Be positioned at digital tuner 123 on the TV SKD 12 under the control of microcontroller 121, receiving digital television signal, and according to the channel of user's appointment, carry out tuning to the described digital television signal that receives, obtain intermediate-freuqncy signal, and send the digital demodulation chip 131 of described intermediate-freuqncy signal to USB module 13, digital demodulation chip 131 carries out analog/digital conversion to the described intermediate-freuqncy signal that receives earlier, obtain digital signal, again described digital signal is carried out channel demodulation, obtain TS stream, send the USB controller 132 that described TS flow to USB module 13, USB controller 132 reads described TS stream, and it is encoded, the USB frame of generation standard is sent to the multi-media codec chip 133 of USB module 13, multi-media codec chip 133 reads described USB frame, and it is decoded, coding generates multi-media signal, and wherein said multi-media signal comprises audio signal and vision signal, as one embodiment of the present of invention, described vision signal is the YPbPr signal that generates through coding.Multi-media codec chip 133 sends described multi-media signal to the image/audio process 122 that is positioned on the TV SKD 12, image/audio process 122 is under the control of microcontroller 121, YPbPr signal decoding in the described multi-media signal is reduced into the imaging of RGB tricolor signal, and audio signal and RGB tricolor signal carried out synchronously, display video signal on television display screen curtain 11, pass through audio output apparatus simultaneously, such as loudspeaker 11 output audio signals, realize the broadcast of digital television program.
The digital television signal that Fig. 2 shows the embodiment of the invention to be provided receives the realization flow with the method for playing, and details are as follows:
In step S201, the digital tuner receiving digital television signal of TV SKD.
The numeral tuner is under the control of the microcontroller on the TV SKD, receiving digital television signal, described digital television signal comprises digital catv signal, ground digital television signal, satellite digital TV information, the digital television signal of different transmission meanss has different international standards again, such as ground digital television signal ground digital television broadcast transmission standard (Digital Video Broadcasting-Terrestrial is arranged, DVB-T), advanced television system committee (The Advanced Television System Committee, ATSC) and China Digital TV ground multimedia broadcasting (Digital Terrestrial MultimediaBroadcasting, DTMB) three kinds of standards, when realizing simulated television, select different digital tuners for use according to the international standard that digital television signal adopted to the upgrade conversion of Digital Television.
In step S202, digital tuner carries out tuning to the digital television signal that receives, obtain intermediate-freuqncy signal.
The numeral tuner is under the control of microcontroller, channel according to user's appointment, the digital television signal that digital tuner is received carries out tuning, obtain intermediate-freuqncy signal, (UniversalSerial BUS, USB) the digital demodulation chip on the module carries out channel demodulation to send to USB.
In step S203, the digital demodulation chip of USB module carries out analog/digital conversion to the intermediate-freuqncy signal of the tuning gained of digital tuner, obtains digital signal.
In step S204, the digital demodulation chip carries out channel demodulation to described digital signal, obtains meeting second generation movable image expert group (Moving Picture Experts Group Two, MPEG2) TS of coding stream.
With step S201, when realizing the upgrading of simulated television to Digital Television, conversion, select different digital demodulation chips for use according to the international standard that is adopted of digital television signal.
In step S205, the USB controller of USB module is encoded to TS stream, generates the USB frame.
By the USB controller on the USB module TS stream that the digital demodulation chip carries out the channel demodulation gained is encoded, generate the USB frame that meets the USB standard.
In step S206, the multi-media codec chip of USB module reads the USB frame, and it is decoded, encodes, and generates multi-media signal.
As one embodiment of the present of invention, multi-media codec chip reads the USB frame, decodes, and reads out audio signal and vision signal, and described encoding video signal is generated the YPbPr signal.
In step S207, the image/audio process of TV SKD is decoded to multi-media signal and is exported.
As one embodiment of the present of invention, image/audio process is under the control of microcontroller, YPbPr signal decoding in the multi-media signal is generated the imaging of RGB tricolor signal, and audio signal and RGB tricolor signal carried out synchronously, display video signal on the television display screen curtain, by audio output apparatus,, realize the broadcast of digital television program such as the loudspeaker output audio signal.
One of ordinary skill in the art will appreciate that, realize that all or part of step in the foregoing description method is to finish by the relevant hardware of program command, described program can be in being stored in a computer read/write memory medium, described storage medium is as ROM/RAM, disk, CD etc.
In embodiments of the present invention, the numeral tuner carries out the tuning intermediate-freuqncy signal that obtains to the digital television signal that receives, by the digital demodulation chip described intermediate-freuqncy signal is carried out analog/digital conversion and channel demodulation, obtain TS stream, utilize the USB controller that TS stream is encoded again, convert the USB frame to, at last by multi-media codec chip to the USB frame decoding, coding generates multi-media signal and plays, realizing the upgrading of simulated television to Digital Television, during conversion, signal to the different digital television standard, only need to change digital tuner and digital demodulation chip, hardware is changed little, extensibility and compatible good more helps the exploitation and the upgrading of new product.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a digital television signal receives and the device of playing, and comprises TV SKD and USB module, it is characterized in that described USB module comprises:
The digital demodulation chip is used for the tuning intermediate-freuqncy signal that obtains of the digital tuner of described TV SKD is carried out analog/digital conversion, obtains digital signal, more described digital signal is carried out channel demodulation, obtains TS stream;
The USB controller is used for described TS stream is encoded, and generates the USB frame;
Multi-media codec chip is used for the described USB frame generation multi-media signal of decoding, encode, and sends it image/audio process of described TV SKD to.
2. device as claimed in claim 1 is characterized in that, described TV SKD comprises:
Image/audio process is used for multi-media signal is decoded and exported;
The numeral tuner is used for receiving digital television signal, and the described digital television signal that receives is carried out tuning, obtains intermediate-freuqncy signal;
Microcontroller is used for control figure tuner receiving digital television signal, and the described digital television signal that receives is carried out tuning, obtains intermediate-freuqncy signal and control chart picture/audio process is decoded to multi-media signal.
3. device as claimed in claim 1 or 2 is characterized in that, described multi-media signal is audio signal and vision signal.
4. device as claimed in claim 3 is characterized in that, described vision signal is the YPbPr signal.
5. one kind comprises that claim 1 or 2 described digital television signals receive and the television set of the device of broadcast.
6. a digital television signal receives and the method for playing, and it is characterized in that described method comprises the steps:
The digital tuner receiving digital television signal of TV SKD;
Described digital tuner carries out tuning to the described digital television signal that receives, obtain intermediate-freuqncy signal;
The digital demodulation chip of USB module carries out analog/digital conversion to described intermediate-freuqncy signal, obtains digital signal;
Described digital demodulation chip carries out channel demodulation to described digital signal, obtains TS stream;
The USB controller of USB module is encoded to described TS stream, generates the USB frame;
The multi-media codec chip of USB module is to the described USB frame generation multi-media signal of decoding, encode;
Image/the audio process of TV SKD is decoded to described multi-media signal and is exported.
7. method as claimed in claim 6 is characterized in that, described multi-media signal is audio signal and vision signal.
8. method as claimed in claim 7 is characterized in that, described vision signal is the YPbPr signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810217578A CN101742141A (en) | 2008-11-10 | 2008-11-10 | Device and method for receiving and playing digital television signal and television set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810217578A CN101742141A (en) | 2008-11-10 | 2008-11-10 | Device and method for receiving and playing digital television signal and television set |
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| CN101742141A true CN101742141A (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810217578A Pending CN101742141A (en) | 2008-11-10 | 2008-11-10 | Device and method for receiving and playing digital television signal and television set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105847719A (en) * | 2016-03-22 | 2016-08-10 | 乐视致新电子科技（天津）有限公司 | Television analog signal demodulation method and device |
| CN105915824A (en) * | 2015-12-13 | 2016-08-31 | 乐视致新电子科技（天津）有限公司 | Module group capable of performing signal demodulation and device thereof |
-
2008
- 2008-11-10 CN CN200810217578A patent/CN101742141A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915824A (en) * | 2015-12-13 | 2016-08-31 | 乐视致新电子科技（天津）有限公司 | Module group capable of performing signal demodulation and device thereof |
| CN105847719A (en) * | 2016-03-22 | 2016-08-10 | 乐视致新电子科技（天津）有限公司 | Television analog signal demodulation method and device |
| WO2017161737A1 (en) * | 2016-03-22 | 2017-09-28 | 乐视控股（北京）有限公司 | Television analog-signal demodulation method and device |
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Application publication date: 20100616 |